Back & Lumbar Support Cushions Hunchback Corrector Feature 1.No More Bad Posture. Designed ergonomically to 100% fit your back profile, it can unnoticeably pull your spine to the right position to relieve pressure, improve posture, and alleviate various related pain. 2.Easy to Wear Adjust. Highly resilient breathable fabric is specially used. This skin-friendly strap can filter away sweat to maintain coolness, and be freely stretched to fit all sizes of chest. 3.Dual Reminders for Poor Posture. Can accurately capture the curvature of your back. When the induction angle exceeds certain degree, it will issue clear vibration prompt voice prompt to remind you of it. 4.More Flexible Motion Range. Unlike other correctors, this product features 2 patterns that enable the prompts to be triggered in 2 angles. Youre feel more ease and nearly no discomfort during the whole using process. 5.Scientific Data Analysis. 2 groups of critical data (working time times of poor posture) are recorded for your reference, with which you can better develop and improve your own posture corrective plan. ation 1.Adjust the belt to appropriate length. 2.Wear it (its screen facing outward). 3.Straighten your back and click main switch. 4.Start correction after it vibrates 4 times. Note It is recommended to set the induction angle to 15 when sitting, and 25 when standing/walking before use. Caution 1.Patients with severe spinal deformation should seek help from a doctor. 2.It may take a long time to correct the spine. For a satoisfactory result, please use the product patiently every day. 3.To maximize the effect of the product, please keep your back straight in the whole process of correction. 4.Do not use the product for any purposes other than spine correcting, or its stretching force may do harm to your health. Specification Item Type:Hunchback Corrector Material: ABS + High-strength Elastic Nylon Belt Suitable Chest Size: 70-120cm/28-48in Working Voltage: 3.7V Rated Power: 0.4W Battery Specification: 500mAh/3.7V Charing Time: About 2 Hours Charging Voltage: 5V Using Time: 15 Days Weight: 80g Size:7*8.5*1.2cm/2.8*3.3*0.5in Product Include 1*Corrector 1*USB Cord 1*Manual 1*Box